Google announced last week that it was starting to do full encryption for some search services. This shouldn’t be surprising to those folks who use GMail, as Google started doing full encryption for that quite a while ago.
You can now go to https://www.google.com/ and have full SSL encryption when you’re doing regular Web search. Emphasis on regular Web search; Google notes “when you search using SSL, you won’t see links to offerings like Image Search and Maps that, for the most part, don’t support SSL at this time.” The search will also be a little bit slower, as the encryption has to be processed (I doubt you’ll even notice.)
Matt Cutts has a few more thoughts that you can read on his blog.